import numpy as np

t1 = np.array([range(1,25)]).reshape((4,6))
print(t1)

t2 = np.array([range(1,13)]).reshape(2,6)
print(t2)

print(t1+2)

t3 = np.array([range(1,25)]).reshape((2,3,4))
print(t3)

print(t3[:,:,2])  #索引？？？？？
